czimpel
Boost...gotta get some!
- Joined
- Aug 16, 2012
- Messages
- 748
I've been trying to track down a knock issue since I got my car running this spring. I'm pretty sure it's not a lean detonation issue. Currently running E85 @20 psi TT 5.7 E85 chip for 120's and 30 psi boost. No knock at full boost(20 psi 10.5 afr), but at times up to 7˚ transitional knock from nothing to WOT full boost.
Here's something new I found in the last couple weeks.
If I ease into the throttle and hold the boost at about 10-12 psi, this is where the knock happens. AEM wideband is bottomed out at 10.0, so it's obviously pig rich at this boost level. I read a couple posts that said that a rich condition can also cause knock.
Problem is, there is no adjustment that I know of in my chip to change my fuel maps at anything other than WOT. Is there anything else that can be done? How low can I run my fuel pressure?
Here's something new I found in the last couple weeks.
If I ease into the throttle and hold the boost at about 10-12 psi, this is where the knock happens. AEM wideband is bottomed out at 10.0, so it's obviously pig rich at this boost level. I read a couple posts that said that a rich condition can also cause knock.
Problem is, there is no adjustment that I know of in my chip to change my fuel maps at anything other than WOT. Is there anything else that can be done? How low can I run my fuel pressure?